Are Apes Entering the Stone Age?

Last week we looked at the fact that very simple life forms that do not have brains attempt to survive, adapt in order to do so, and often communicate for that purpose. Yet they are probably not conscious and do not likely have a sense of self. Something seems to process a large amount of information in or for them.

Studying ourselves sheds little light on animal mind because human mind or consciousness is the greatest unsolved problem in philosophy. But we might continue to explore the ques...